EFFECT OF IBA AND BIOPREPARATIONS ON ROOTING PERFORMANCE OF COTINUS COGGYGRIA SCOP.
Rooting is an important step in vegetative plant propagation; failure to form roots always creates losses. EU-imposed restrictions on chemicals used in plant production create need for test of new natural products that may enhance rooting in commercial production. This study tested the effect of two biological preparations: AlgaminoPlant and Route on the difficult-to-root smokebush in conventional propagation and in micropropagation. Stem cuttings were sprayed with the biostimulators in different combinations and their efficiency was compared to the commonly used synthetic auxin β-indolyle butyric acid (IBA) used either as a commercial rooting powder Rhizopon AA or a foliar application of the aqueous solution of IBA. The success rate was measured by the rooting percentage and the degree of root ball development. Treatment with a aqueaous solution of IBA was more effective than Rhizopon AA. AlgaminoPlant and Route enhanced rhizogenesis so they are viable substitutes for synthetic auxins in conventional propagation of C. coggygria. In in vitro propagation, microshoots were cultured on Murashige and Skoog (MS) medium supplemented with IBA or biostimulators. The highest rooting rate was recorded for the 10-30 mg dm-3 IBA. AlgaminoPlant added to the medium increased the number of roots produced by microcuttings while Route had a deleterious effect. The experiments show that biostimulators are commercially viable substitutes for commonly used hormones in nursery handling of even difficult stocks.
Pacholczak, A., Ilczuk, A., Jacygrad, E. and Jagiello-Kubiec, K. (2013). EFFECT OF IBA AND BIOPREPARATIONS ON ROOTING PERFORMANCE OF COTINUS COGGYGRIA SCOP.. Acta Hortic. 990, 383-389
biostimulators, cuttings, micropropagation, rhizogenesis, smokebush, synthetic auxins